Briefly wearing my editor hat.

Not that I have seen any of these in the current submissions thus far, but please refrain from using names starting with Z, X or certain K names. It is not necessary to use a weird name to establish a scenario of a fantasy or science fiction book. All it effectively does is establish the author as a rank amateur.

The use of setting is best employed for this purpose. Also language and strategies for the characters to interact. Think carefully about these. A setting is not merely cardboard props for the establishment of a world. It has to live and breath. Language does not have to be dialect, but it does need to differentiate the races with word choices. Strategies must encompass out of the norm experiences for the characters.